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Home : Review Topics : Energy Star Rated Windows What Are Energy Star Rated Windows?
Energy Star rated windows are certified by the NFRC or National Fenestration Rating Council and must meet stringent criteria for energy efficiency. The "Energy Star" designation came about as a way to promote replacement windows that were better for the environment. The certification is just for home windows -- it's on all kinds of products: refrigerators, washers, dryers, doors, etc.
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Basics Of ESRWsESWs are designed to optimize thermal performance, ensuring that homes remain comfortable throughout the year. This in turn minimizes the need for excessive heating or cooling. These window series are built with advanced technologies that reduce heat transfer, prevent air leakage, and block harmful ultraviolet (UV) rays.
Energy Star Windows PricesEnergy Star rated windows have NO SET PRICE, although they will (usually) be more expensive than non Energy Star options. To get the ES certification, manufacturers have to make at least a decent window, so it makes sense that they are going to be pricier than more or less your worst vinyl windows on the market.
Energy Star Vinyl Window Costs 2023
Federal RebateEnergy Star windows are eligible for a federal rebate of up to $3200 (in 2023). Whether or not they're eligible will depend on the specific climate zone in which you live. There are four climate zones in the United States: Northern, North-Central, South-Central, and Southern.
NFRC LabelAny window that is ENERGY STAR qualified will have a distinctive sticker on the front or side -- its easy to find in most cases. The sticker includes manufacturer name, model number, the blue logo, and the performance data on the NFRC label. This performance data can be split into five parts: U-Factor: U-factor, or U-value is a measure of a window's heat loss. U-factor ranges in value between 0.10 and 1.3 - the lower the number, the better the energy efficiency.
Air Infiltration: Air infiltration or AI is a measure of how much air leaks through the window unit. Air infiltration ratings range between 0.01 and 1.0. The lower the AI rating, the less air enters through the unit and the better the window unit.
Solar Heat Gain Coefficient: Solar Heat Gain Coefficient measures the heat that enters through the window glass and frame (mainly through the glass). SHGC window ratings range from 0 and 1.0. The proer SHGC level will depend on where you live - so it's not a set number at all. If you live in a hot climates, you would want window glass that reflects more heat and has a lower SHGC. Conversely, if you live in a cold climate, you would want to let more heat enter through the glass and therefore has a higher SGHC. The main way SHGC is modulated is through low-e coatings on the window glass. Visible Transmittance: Visible Transmittance is the measure of how much light a window lets in. VT ranges from 0 and 1. The higher the visible transmittance rating, the more natural light will be allowed to flow into the room. Clear glass will have a high VT as it lets in lots of light, but is not very energy efficient. A low-e3 glass (very energy efficient) will have a low VT. There is a balance here that consumers will have to take into consideration -- how much heat do you want to stay out of the house and how much light do you want to allow in.
Importance Of Energy Star Rated WindowsThere is actually little importance for me of having this designation on a window. I've seen the label on some series that I would consider to be pretty poor quality. I am MUCH more interested in seeing the air infiltration rate and design pressure rating of a replacement window. These data points are much more important in terms of making your home energy efficient. Still, an energy star rated window does mean it has passed that threshold set forth by the certification team.
Energy Star Windows Cost EstimatorOur ES windows cost estimator can provide you with basic pricing -- basically industry standard pricing. What the calculator can't provide is a fair market price for your window replacement project. This can only be achieved through getting multiple leads from top quality companies in your area. Play around with the cost estimator and shoot us an email with any questions you might have.
Energy Star Window LabelsHi Dane, very nice job with your youtube channel. I did subscribe to it.
[Site Editor's Answer]Mike, thanks for the youtube subscription, every little bit helps!
Energy Star Rated WindowsI thought you might say that based on other responses I've read, but many were older and I wasn't sure about 2023 prices. This guy first gave us a much higher price and said he could combine it with a large condo order he was about to place. That cut off $8,000 and sounds bogus to me. He also said that Energy Star standards for windows are going to change in a month and several competitors would no longer qualify. Sounds like more BS.
[Site Editor's Answer]David, for me, anything over $1K per window calls for additional bids. You might have project specifics that warrant that price, but you'll never really know unless you get a couple more bids. Sunrise makes a great window, but there are lots of other companies that do as well. I don't know specifics in terms of which series don't make the cut and which do -- we're going to have to wait and see what they exact numbers are before we will know the results. Kind of a strange situation if you ask me -- and I think you agree :)
Energy Star WindowsDane, we appreciate your response (and your expertise) whenever it comes. I filled out the quote request as you suggested. We'll see what else we get - I'm excited. I’m in a suburb of Detroit, MI
[Site Editor's Answer]Anne, I would hope that most of my recommendations would meet the new Energy Star guidelines, however I’ve been amazed by some of the requirements — although there are lots of regions and each one has different requirements. At the end of the day, I would always go with a top tier brand and series — and agin, these should meet the requirements.
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